General Description

The FM51 is a high-precision CMOS temperature sensor that provides a cost-effective solution for applications requiring highaccuracy temperature monitoring. The FM51 is ideally suited for applications requiring high drive current. The FM51 output voltage ramp is extremely linear and has a slope of 10mV/°C. It is typically accurate to ±1°C over a temperature range of -40°C to 125°C and has a typical room temperature accuracy of ±0.5°C. The output voltage characteristic for the FM51 is illustrated in Figure 1.

Features

■ Precision Calibrated to ±1°C (Typical)

■ Temperature Range: -40°C to 125°C

■ Extremely Linear Output Ramp (10mV/°C)

■ Low Output Impedance for 1mA Load

■ Output Ramp is Calibrated in Degrees Celsius

■ Low Operating Current <130µA (no load)

■ Low Self Heating (0.2°C Max in Still Air)

■ Operating Voltage Range: +2.7V to +6.0V

■ Uses a Single Positive Supply

■ Non-linearity ≤ 0.8°C

Applications

■ Computers

■ Battery Management

■ FAX Machines/Printers/Copiers

■ Portable Medical Instruments

■ HVAC

■ Power Supply Modules

■ Disk Drives

■ Automotive Control Circuits